<template>
  <div>
    <el-button @click="onToggle">
      <el-icon>
        <full-screen></full-screen>
      </el-icon>
    </el-button>
  </div>
</template>

<script setup lang="ts">
import { ref, onMounted, onUnmounted } from "vue";
import screenfull from "screenfull";

// 是否全屏
const isFullscreen = ref(false);

// 监听变化
const change = () => {
  isFullscreen.value = screenfull.isFullscreen;
};

// 切换事件
const onToggle = () => {
  screenfull.toggle();
};

// 设置侦听器
onMounted(() => {
  screenfull.on("change", change);
});

// 删除侦听器
onUnmounted(() => {
  screenfull.off("change", change);
});
</script>

<style lang="less" scoped></style>
